AI Article Synopsis
- The study used microwave digestion with HNO3 and H2O2 to analyze levels of lead (Pb), cadmium (Cd), and chromium (Cr) in the surface materials of wood-based panels using atomic absorption spectrometry.
- Detection limits for Pb, Cd, and Cr were established as 0.12 µg/mL, 0.029 µg/L, and 0.146 µg/L respectively, with cadmium having a limit of 0.157 µg/L via a different method.
- The method demonstrated high precision and recovery rates for all three metals, indicating that it is accurate and reliable for ensuring safety standards in wood-based panel materials, potentially aiding in the creation of a national standard in
Article Abstract
With microwave-digestion as a sample decomposition technique and HNO3 and H2O2 as digestion reagent, the contents of Pb, Cd and Cr in surface decorating materials of wood-based panels were determined by atomic absorption spectrometry. The detection limit of Pb, Cd and Cr of FAAS is 0.12 microg x mL(-1), 0.029 microg x L(-1) and 0.146 microg x L(-1); respectively, the cadmium detection limit of GFAAS is 0.157 microg x L(-1). The precision of lead was between 0.8% and 3.0% and the recoveries ranged from 94% to 109.2%. The precision of cadmium was between 0.8% and 2.1%, and the recoveries ranged from 94.6% to 106.4%. The precision of chromium was between 1.8% and 4.9%, and the recoveries ranged from 98.8% to 107.7%. The method is accurate and reliable, and suitable and applicable to determining heavy metal of surface decorating materials of wood-based panels. The result is expected to provide scientific basis for establishing a corresponding Chinese national standard.
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